reckonerWrist curl
Sit with your forearm resting on your thigh and your palm up, and curl a dumbbell using nothing but your wrist. It loads the muscles on the palm side of the forearm that bend the wrist1. It is a small movement, and it goes wrong the moment the weight is bigger than the wrist can control.
Palm up, forearm braced, curl the wrist.
- Pattern
- Arm isolation
- Trains
- Forearms
- Kit
- Dumbbell
- Loading
- A weight you choose
- Reckoner prescribes
- 3 sets of 10 to 15 reps at RPE 8
- Progression step
- 1 kg once the top of the range is clean
- Skill
- Simple to learn
- Recovery cost
- Very low
- Not prescribed if you have declared
- Wrist, elbow
Muscles worked
How to do it
Support the whole forearm
Sit on a bench with a dumbbell in one hand, palm up. Rest the back of your forearm on your thigh, or lay it along the bench, with your wrist past the edge so your hand hangs free2. Everything from the elbow to the wrist stays still from here on.
Let the wrist open
Lower the back of your hand until the weight hangs from your wrist and your fingers loosen a little. Let the bell roll toward your fingertips only as far as you still keep hold of it.
Curl with the wrist alone
Close your wrist and bring your knuckles up toward the ceiling. The forearm does not lift off your thigh, the elbow does not swing, and the weight does not travel by any route except the wrist.
Lower it slowly
Take longer coming down than going up. A physical therapy source gives a slow count of four on the way down and two on the way up2, which is a good pace to copy.
End the set when control goes
Stop when the curl gets shorter, the forearm starts to help, or you cannot lower the weight smoothly. Log the last rep you controlled, not the last rep you survived. Do one forearm at a time or both together, whichever keeps the forearm supported.
What goes wrong
Bouncing out of the bottom
The weight drops fast and rebounds, and the rebound lifts it. It feels like a strong rep because the bell moves, but the muscle did less of the lifting. Lower with control and let the bell stop for a beat before you curl.
Letting the wrist flop when it tires
Late in a set the hand drops with no control and the curl shrinks to a flick. It looks like effort and it is the set ending. When you cannot hold the top or lower smoothly, put the dumbbell down.
Using too much weight
The tell is everywhere except the wrist: the forearm rises off your thigh, the elbow swings, or the hand only travels part of the way. The wrist is a small joint with a small range, so use a weight you can lower for the full slow count and add to it in small steps.
How Reckoner progresses this lift
Six weeks of this lift, run through the real engine. Nothing below was typed in: the prescription, the decision and the sentence beside it all come from the same code that writes your week.
| Week | Prescribed | What it did |
|---|---|---|
| 1 | 3 x 10 | More reps 10 → 11 repsYou finished every set with three reps left in the tank (RPE 7) and room left in the range, so the reps climb before the load does. |
| 2 | 3 x 11 | More reps 11 → 12 repsYou finished every set with three reps left in the tank (RPE 7) and room left in the range, so the reps climb before the load does. |
| 3 | 3 x 12 | More reps 12 → 13 repsYou finished every set with three reps left in the tank (RPE 7) and room left in the range, so the reps climb before the load does. |
| 4 | 3 x 13 | More reps 13 → 14 repsYou finished every set with three reps left in the tank (RPE 7) and room left in the range, so the reps climb before the load does. |
| 5 | 3 x 14 | Deload 40% of sets offFive weeks of building, then one week lighter. About 40% of the sets come off. The load holds and your reps stay where you earned them, so you keep the strength and lose the fatigue. |
| 6 | 2 x 14 | More reps 14 → 15 repsYou finished every set with three reps left in the tank (RPE 7) and room left in the range, so the reps climb before the load does. The lighter week is over, so this is back to three sets. |
Real engine output, not an illustration. Every row was produced by running the engine itself when this page was generated.
The full rule, and why the reps move before the load does, is in how Reckoner decides to add weight.
Questions people ask
What does the wrist curl work?
The muscles on the palm side of the forearm, which bend the wrist1. The reverse wrist curl is the same movement with the palm down, and it works the muscles on the other side.
Will wrist curls make my forearms bigger?
We found no trial that compares the wrist curl with other forearm work for muscle size, so this page makes no claim either way. What the lift does is load the wrist flexors directly, and that is its one job.
Why is the wrist curl not in my plan?
Reckoner never puts it in a plan for you. You choose it when you want forearm work. It is also not offered to anyone who has told Reckoner that a wrist or an elbow is a problem.
What if my wrist or elbow hurts?
Do not train through it, and do not use this page to treat it. Pain at the wrist or the elbow is a job for a physical therapist or a doctor. Slow, loaded wrist exercises do appear in treatment programs for tennis elbow, and reviews of that treatment describe them as one part of a program a clinician sets up3. Which exercise, how heavy and how often is their call, not Reckoner's.
Similar movements
Reckoner has no other movement in this swap group.
Sources
- Mitchell B, Whited L, StatPearls, 2023. Anatomy, Shoulder and Upper Limb, Forearm Muscles the forearm holds an anterior flexor compartment and a posterior extensor compartment, whose muscles act on the wrist
- Merck & Co., Inc., MSD Manual Professional Edition, 2026. Resisted Wrist Flexion With Weight forearm resting on a table palm up with the hand off the edge, curl the wrist up and lower it slowly, with a four count down and a two count up
- Cullinane FL, Boocock MG, Trevelyan FC, Clinical Rehabilitation, 2014. Is eccentric exercise an effective treatment for lateral epicondylitis? A systematic review a systematic review of twelve studies of tennis elbow, where the consistent findings supported eccentric exercise, slow lowering of a load, as one part of a treatment program run by a clinician